Fig. (7) Kinetic behavior of TA-Zn in a buffer solution at pH 5.5 and 8 in 1:1 (A5) and 1:5 (A6) ratio in the following concentrations: 0.16 g L-1 (C1); 0.12 g L-1 (C2); 0.08 g L-1 (C3) and 0.04 g L-1 (C4). A5 and A6 are representative of all compounds.